The company also said it expected to lose more money than was forecast in its previous guidance, and that its bookings would end up in the lower half of estimates.

NASDAQ halted trading on shares at one point before they finished at $2.99, a loss of over 12 percent on the day.A spokesperson told us the company would have no comment beyond its press release and what company founder and CEO Mark Pincus wrote in a blog post today, which includes this …

None of us ever expected to face a day like today, especially when so much of our culture has been about growth. But I think we all know this is necessary to move forward. The scale that served us so well in building and delivering the leading social gaming service on the Web is now making it hard to successfully lead across mobile and multiplatform, which is where social games are going to be played.

Zynga went public in late 2011 amid a mini-resurgence in the tech IPO market. But the initial offering landed with a thud. The stock hit a high of almost $16 in Mar 2012; it’s now trading at about $3.

Zyngas’s fortunes have often seemed closely tied with those of Facebook, where its games have been tightly integrated. As the Wall Street Journal reported in March …

Founded in 2007, the game maker grew rapidly by leveraging Facebook’s social network, taking advantage of its structure and its sharing tools to encourage players to connect with their friends. In 2011, the company made up about 12% of Facebook’s revenue.

However, the relationship, at times, has been strained. And, in more recent quarters, Facebook and Zynga have drifted further apart, with Zynga opening its own portal and investing more in its mobile applications and Facebook promoting the games of other developers. Nevertheless, Zynga still makes the bulk of its money from Facebook. The social network accounted for 79% of Zynga’s bookings in the fourth quarter.

In April the company entered the online gambling space in the U.K. It has also applied for a license with the Nevada Gaming Control Board and hired lobbyists to push for online gambling. Sam Harnett reported on this new initiative for KQED in January.

“Making the transition to real money gambling for Zynga won’t be as simple as pulling a lever,” Harnett wrote.